IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0293674
(2007-03-16)
|
등록번호 |
US-8191619
(2012-06-05)
|
우선권정보 |
RU-2006108988 (2006-03-21) |
국제출원번호 |
PCT/RU2007/000133
(2007-03-16)
|
§371/§102 date |
20081020
(20081020)
|
국제공개번호 |
WO2007/108722
(2007-09-27)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Schlumberger Technology Corporation
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
The claimed invention relates to the downhole systems for extracting various fluids, in particular—for simultaneous extraction out of a number of producing formations. The inventive downhole system comprises a casing pipe and a tubing extending through said casing pipe, between which pipe and tubing
The claimed invention relates to the downhole systems for extracting various fluids, in particular—for simultaneous extraction out of a number of producing formations. The inventive downhole system comprises a casing pipe and a tubing extending through said casing pipe, between which pipe and tubing formed are separate isolated cavities. Each one of which cavities communicates, via perforations, with a respective producing formation. In each one of the isolated cavities, to the tubing coupled is a hydraulic machine comprised by a motor and pump. The hydraulic machines in different isolated cavities being adapted to be adjusted independently. This system permits simultaneous extraction of fluids out of different producing formations, with independent controlling of such extraction in various formations. The claimed invention also relates to an immersion hydraulic machine used for extracting fluids.
대표청구항
▼
1. A downhole system for extracting fluids, comprising a casing pipe and a tubing extending through said casing pipe, between which pipe and tubing are formed separate isolated cavities, each cavity communicating, via perforations, with a respective producing formation; in each one of the isolated c
1. A downhole system for extracting fluids, comprising a casing pipe and a tubing extending through said casing pipe, between which pipe and tubing are formed separate isolated cavities, each cavity communicating, via perforations, with a respective producing formation; in each one of the isolated cavities, a hydraulic machine is coupled to the tubing to achieve a common flow, the hydraulic machine comprising a hydraulic motor and pump;the hydraulic machines being in different isolated cavities and being adapted to be adjusted independently of one another to achieve a flow of each extracted fluid at a respective flow rate from each corresponding isolated cavity into a common flow in the tubing;wherein when an isolated cavity has a natural positive pressure to drive a flow of the extracted fluid through the pump of the hydraulic machine, the pump acts as a motor to drive the hydraulic motor as a passive pump, and the respective flow rate of the isolated cavity is achieved by constricting a flow of a working hydraulic fluid being pumped by the passive pump; andwherein when an isolated cavity has a natural negative pressure, the hydraulic motor adjustably drives the pump to provide artificial lift of the corresponding extracted fluid. 2. The system as claimed in claim 1, characterized in that said independent adjustment of the respective hydraulic machine is performed by a separate control unit adapted to adjust, supply to or output of the motor of the hydraulic machine. 3. The system as claimed in claim 2, characterized in that the control unit is adapted to adjust rotational speed of a hydraulic machine motor shaft, which motor is a hydraulic motor. 4. The system as claimed in claim 3, characterized in that the control unit includes an adjustable or permanent throttle positioned on the hydraulic line of said hydraulic motor. 5. The system as claimed in claim 2, characterized in that the control unit is adapted to adjust a value of eccentricity between the housing and shaft of a hydraulic machine motor, which motor is a hydraulic motor. 6. The system as claimed in claim 5, characterized in that the control unit includes an assembly of rod-hydraulic cylinder, a gearing assembly, or a similar means adapted to exert an action on a hydraulic motor shaft to change said eccentricity. 7. The system as claimed in claim 3 or 5, characterized in that the hydraulic motor is a positive-displacement rotary unit. 8. The system as claimed in claim 7, characterized in that the rotary positive-displacement unit is an impeller (guided-vane) pump, screw pump, labyrinth pump, or similar pump, or a modification thereof. 9. The system as claimed in claim 7, characterized in that the hydraulic motor is adapted to brake the pump in the mode of flowing well operation. 10. The system as claimed in claim 9, characterized in that said braking is done using a throttle positioned on the hydraulic motor supply line. 11. The system as claimed in claim 7, characterized in that the hydraulic motor is adapted to supply at least a portion of the working fluid into the pump. 12. The system as claimed in claim 2, characterized in that the supply for motor of each one of the hydraulic machines is provided by a single supply line. 13. The system as claimed in claim 2, characterized in that the supply for motor of each one of the hydraulic machines is provided by a separate supply line. 14. The system as claimed in claim 1, characterized in that the pump is implemented in the form of a rotary positive-displacement unit. 15. The system as claimed in claim 14, characterized in that the rotary positive displacement unit is an impeller (guided-vane) pump, screw pump, labyrinth pump, or similar pump, or a modification thereof. 16. The system as claimed in claim 1, characterized in that each one of the pumps is provided with a sensor adapted to determine speed and/or volume, and/or composition of the extracted fluid.
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